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Method for preparing composite material containing Y-type molecular sieve

A composite material and molecular sieve technology, applied in the field of preparation of Y-type molecular sieve, can solve the problems of decreased catalyst strength, high production cost, low catalyst molecular sieve content, etc. Effect

Inactive Publication Date: 2006-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, the molecular sieve content of the catalyst is low and cannot be flexibly adjusted, and its molecular sieve content is generally controlled at 20-30%. If the molecular sieve content is too high, the catalyst strength will decrease; secondly, the kaolin microsphere matrix is ​​composed of kaolin calcined at different temperatures, in order to take into account the molecular sieve content. and catalyst strength, the content of the low-temperature roasted metakaolin and high-temperature roasted clay must meet a certain ratio. As a result, the skeleton silicon-aluminum ratio of Y molecular sieve is relatively low, generally only about 4.6; in addition, it can be seen from its preparation process that the The preparation process of composite materials is complicated and the production cost is high

Method used

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  • Method for preparing composite material containing Y-type molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example illustrates the preparation of a composite material containing Y-type molecular sieve using pseudo-boehmite as a carrier material according to the method provided by the present invention.

[0029] Get 100ml water glass (Changling Oil Refinery Chemical Plant Catalyst Factory product, specific gravity 1.26, SiO 2 content 255.8g / L, modulus 3.24) into a beaker, add 70.7g high sodium metaaluminate solution (product of Changling Refinery and Chemical Plant Catalyst Factory, specific gravity 1.33, Al 2 o 3 Content 41g / L, Na 2 O content 280g / L), after mixing evenly, aged at room temperature for 24h, the desired directing agent was obtained, and its molar ratio was 16Na 2 O:Al 2 o 3 : 15SiO 2 : 320H 2 O.

[0030] NaY molecular sieve according to 2.76Na 2 O:Al 2 o 3 : 8.4SiO2 2 :209H 2 O ratio synthesis. Under stirring, 370ml of deionized water, 165g of directing agent, 247ml of aluminum sulfate solution (product of Changling Refinery and Chemical Plant...

Embodiment 2

[0034] This example illustrates the preparation of a composite material containing Y-type molecular sieve with diatomaceous earth as the carrier material according to the method provided by the present invention.

[0035] Add 600g of diatomite (product of Qingdao Sanxing Diatomite Co., Ltd., brand name is AG-JXA) to 2000g of NaY molecular sieve synthetic gel prepared according to Example 1, stir evenly, and then statically crystallize at 100°C for 32h, The crystallization is stopped, and the product is filtered, washed and dried to obtain a composite material containing Y-type molecular sieves.

[0036] The relative crystallinity of the composite material sample measured by X-ray diffraction method is 89%, SiO 2 / Al 2 o 3 is 5.12. The total specific surface area measured by BET method is 684m 2 / g, where the mesopore specific surface area is 112m 2 / g, the mesopore volume is 0.168mL / g.

Embodiment 3

[0038] This example illustrates the preparation of a composite material containing Y-type molecular sieve with α-gibbsite as carrier material according to the method provided by the present invention.

[0039] Add 1000g of α-gibbsite (product of Aluminum Corporation of China Shandong Branch Company, brand name AH-1) to 2000g of NaY molecular sieve synthetic gel prepared according to Example 1, stir well and then age at 40°C for 15h, then at 100 After static crystallization at ℃ for 28 hours, the crystallization was stopped, and the product was filtered, washed, and dried to obtain a composite material containing Y-type molecular sieve.

[0040] The relative crystallinity of the composite material sample measured by X-ray diffraction method is 86%, SiO 2 / Al 2 o 3 is 5.03. The total specific surface area measured by BET method is 595m 2 / g, in which the mesopore specific surface area is 94m 2 / g, the mesopore volume is 0.144mL / g.

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Abstract

The process of preparing composite material containing type-Y molecular sieve includes the following steps: the first synthesis of NaY molecular sieve guiding agent; the subsequent preparing molecular sieve gel with water glass, guiding agent, acid aluminum salt and sodium meta-aluminate; adding material capable of being used as carrier into the gel and crystallizing; and final filtering, washing and drying. The process results in compact combination between type-Y molecular sieve and the carrier and raised molecular sieve stability, and the prepared composite material may be modified as common molecular sieve and has medium holes specific surface area greater than 60 sq m / g and medium holes volume greater than 0.15 ml / g.

Description

technical field [0001] The invention relates to a method for preparing a composite material containing Y-type molecular sieve, or a method for preparing a loaded Y-type molecular sieve. Background technique [0002] As the core technology of oil refining industry, catalytic cracking has attracted much attention. Since Exxon developed the first fluid catalytic cracking technology in 1942, catalytic cracking has developed rapidly. By 2000, the processing capacity had reached 702.8Mt / a. In my country, 70% to 80% of gasoline comes from catalytic cracking, and its role in the entire refining industry is even more critical. At present, crude oil is becoming increasingly heavy and inferior; the market needs to further lighten and clean the products; the production requires pollution-free and emission-free greening, all of which pose great challenges to catalytic cracking. In view of this, the development of various new catalysts and new technologies for catalytic cracking is in ...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J37/02C01B39/04C01B39/34C10G11/05
Inventor 刘中清何鸣元傅军罗一斌崇奇舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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